| 摘要 |
<p>Heater comprises a relatively shallow but extensive liquid container with heat insulation on all its surfaces in contact with ambient air. To increase efficiency, a float-operated valve keeps the liquid level constant. - A hob liquid outlet pipe, a trap made as a translucent surface with heat insulation at its bottom and sides and a heat conductor, also supplement a motor-pump assembly for movement and transport of the liquid.</p> |
